Some of the concept art can be seen in the youtube link on this post: http://fallout.wikia.com/wiki/User_blog:Mirokunite/Old_World_Blues_concept_art
... Ulysses outfit with 3 different insignia in the back (USA, NCR and Legion)
... Some kind of heavy weapon (energy based?)
... Odysseus concept art?
... Robotic Scorpion.
... Assassin suit reskin (we seen in the earlier preview).
... Big Mt. Research and Development Center (yes, its written on the artwork) cutout, most of the installation seems to be underground.